Tray attachment for blackboards.



PATENTED MAR. 31, 1908.

I J. W. HAINLINR' TRAY ATTAGHMENT FOR BLAOKBOARDS.

APPLICATION FILED MAY 27, 1907.

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with the bottom of the tray JOHN W. HAINLINE, OF GREAT BEND, KANSAS.

TRAY ATTACHMENT FOR BLACKBOARDS.

Specification of LettersZPatent. Patented March 31, 1908.

Application filed May 27, 1907. Serial No. 376,034.

To all whom it may concern:

Be it known that I, JOHN W. HAINLINE, a citizen of the United States,residing at Great Bend, in the county of Barton and State of Kansas,have invented certain new and useful Improvements in Tray Attachmentsfor Blackboards, of which the following is a speci fication.

This invention pertains to improvements in tray attachments forblackboards, and more particularly to a tray attachment which collectsthe dust from the chalk, as well as that which notoriously is collectedby the eraser, and retains the same at points remote from the chalk anderaser, thus leaving each of the latter free from contact with the chalkdust after the latter has become free of the chalk and eraser.

The invention aims to generally improve, simplify and increase theefficiency of trays of this type and at the same time to render thecleansing of the collecting tray easier than heretofore.

With the above and other objects in view, my invention consists in thenovel details of construction and combination of parts to be fullydescribed in the following specification and later pointed out in theclaims.

Referring to the accompanying drawings forming a part of thisspecification and wherein like characters of reference denote similarparts throughout the several views 2-- Figure 1, is a perspective viewof my invention, Fig. 2, is a cross section on line 22 of Fig. 1.

In practice I preferably employ two individual supporting base members1, of strip form provided with screw holes for the reception of screwsby means of which thebrackets 2 and 3, are connected to the base membersand the latter to the wall.

The brackets 2, are curved in conformity 7, which is mounted thereon. Tosecure the tray to the brackets 2, I use fastening means 7, which passthrough the outer ends of the brackets and the side of the tray, asshown.

The brackets 3, are of approximately U- shape, having a straight bottomand upturned ends, upon which bottom a reticulate receptacle 9, rests,saidreceptacle being held against movement by hooked outer portions 5,formed on the outer free ends of the brackets and screws 6, which latterextend through the Wide imperforate sheet metal back 10, of

receptacle 9, and serve to secure receptacle 9, to the base plate andthe wall.

The tray 7, is preferably formed of imperforate sheet metalmadeapproximately U- shaped in cross section, being of requisite length.

The receptacle 9, is of the same length as tray 7, and made of perforatematerial mounted upon an oblong open sheet metal frame 9, having theaforesaid wide back plate 10, which seats on the inner ends of brackets3. Frame 9, is constituted of a front member 9 and endmembers 9*, eachformed of narrow strips of metal, the-end members 9*, being connected tothe back plate 10.

The tray 7, and receptacle 9, are superposed in such relation as toprovide a Wide, open space between them to enable easy and convenientaccess to the receptacle 9, with a brush or other implement.

The chalk dust resulting from use of the chalk and eraser naturallydrops through the reticulate bottom of receptacle 9, and is caught bythe imperforate tray or receptacle. It is also possible to cleanseerasers by rubbing them on the reticulate bottom of tray 9.

Back plate 10, serves to protect the lower portion of the black boardand prevents the eraser and chalk from discharging their dustthereagainst when the eraser and chalk are placed in the erforate tray.

It will be observed that since the tray and the receptacle areseparately and independently supported, either may be removed Withoutdisturbing the other and since a wide open space is left between the twoan unobstructed passage is left for the'insertion of a cleaninginstrument.

Having thus described my invention what I claim as new, and desire tosecure by Letters Patent is l. A device of the class described,comprising superposed trays one of perforate and the other ofimperforate material disposed to have a wide open space therebetween.

2. A device of the class described comprising vertical base stripsbrackets supported on said strips, an im erforate receptacle on thelower of said rackets, and a reticulate receptacle on the upper of saidbrackets, said receptacles having a wide open space therebetween.

3. A device of the class described, comprising supporting base members,superposed brackets on each of said base members, retaining hooks orfingers on the upper of said brackets, an imperforate sheet metalreceptacle on said lower brackets, and a reticulate receptacle on saidupper brackets.

4. A device of the class described, comprising supporting base members,approximately U-shaped brackets supported on said base members one abovethe other, with a wide open space between said brackets, retaining hookson the outer ends of the upper brackets, a receptacle of imperforatematerial mounted on said lower brackets and secured thereto, and anoblong open frame having a reticulate bottom portion mounted on saidupper brackets and secured by said hooks of the upper brackets, and awide back plate carried by said open frame and secured to said basemembers, and seating on the inner ends of the upper brackets.

5. A tray attachment for blackboards consisting of a trap of foraminousmaterial having a frame formed of a front member and end memberseach ofstri like form, a wide back plate to abut the b ackboard and protect thelatter, said end members being connected to the lower portions of theback plate, means to secure the back plate to the blackboard, and areceptacle of imperforate material secured to the blackboard below saidtray so as to leave a wide 0 en space between the two, said receptac ebeing removable independent of the tray from the blackboard.

6. An attachment for blackboards consisting of a perforate and animperforate tray disposed in superposed. relation so as to have a wideopen space therebetween, and means for attaching each tray independentlyto the blackboard, so that the imperforate tray may be removed withoutdisturbing the perforate tray.

JOHN W. HAINLINE Witnesses:

H. E. LINDAS, CABLE HILL.

